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Background: Educational games are increasingly recognized as effective teaching tools, especially in elementary education. This study focuses on the application of a treasure hunt game in teaching mathematics, specifically time measurement concepts, to second-grade students at SD Islam PB Soedirman, Cijantung, East Jakarta. Aim: The primary aim of this research was to assess the impact of the treasure hunt game on the improvement of mathematical learning outcomes among the students. Method: This research adopted a quantitative experimental approach with a Post-test Only Control Group design. The sample consisted of 50 second-grade students divided into two groups: an experimental group (2D) and a control group (2G), each with 25 students. The experimental group was taught using the treasure hunt game, while the control group did not receive any special intervention. Data collection was conducted through observation and objective testing with 13 multiple-choice questions that had been validated. Data analysis was performed using SPSS for testing validity and reliability, as well as for prerequisite and hypothesis testing. Results: The prerequisite test results indicated that the data were homogenous and valid. The hypothesis testing, conducted using a paired t-test, showed a significant value of 0.003 (p < 0.05), indicating a significant difference between the experimental and control groups. Conclusion: Based on the findings, it can be concluded that the treasure hunt game significantly influences the improvement of mathematical learning outcomes in time measurement for second-grade students. This suggests the effectiveness of game-based learning methods in the context of elementary mathematics education.

Pembelajaran dikelas hanya menggunakan media buku paket tanpa adanya media penunjang lainnya pada pelajaran matematika akibatnya peserta didik menilai matematika itu sukar. Penelitian ini bertujuan guna mengembangkan media pembelajaran audio visual berbasis aplikasi canva pada pokok bahasan pecahan. Dalam penelitian ini metode yang digunakan berupa Research and Development (R&D) dengan model 5 tahapan ADDIE. Penelitian ini dilakukan di SDN Pakansari 02 dengan subjek penelitian kelas V dengan total 33 orang. Instrumen yang dipakai pada penelitian ini yaitu lembar validasi ahli serta lembar respon peserta didik. Hasil uji ahli media diperoleh sebesar 4,53260 dari 5, ahli materi 4,49122 dari 5 serta respon peserta didik 4,49393 dari 5. Sehingga, disimpulkan pengembangan media pembelajaran dikatakan “Valid” dan “Praktis”. Media pembelajaran layak diimplementasikan pada saat dikelas maupun secara sendiri oleh peserta didik.

This study aims to (1) determine the process of developing E-Student Worksheets products and (2) determine the quality and feasibility of E-Student Worksheets products in ethnomathematics-based flat geometry subjects. This study uses a research and development (R&D) approach, with the ADDIE development research model. This research was made by referring to previous studies. According to the preliminary study, there are still many teachers who experience problems in preparing technology-based learning media. In this study, validation tests were carried out by material experts and media experts as well as product feasibility tests by teachers and students. Data was collected by using interview and survey techniques by distributing questionnaires through GoogleForm. Analysis of the data used is a descriptive percentage. The results of the analysis show the following data; in the validation test by media experts, it was obtained 82.5% with the "Very Valid" criteria, in the validation test by material experts it was obtained 74.31% with the "Valid" criteria, in the product feasibility test by the SDN 08 Lubang Buaya teacher which was then obtained 87, 3% with the "Very Feasible" criteria and in the product feasibility test by students (small group) 80.36% obtained with the "Very Feasible" criteria and for students (large group) 84.82% obtained with the "Very Feasible" criteria. This research has contributed to improving mathematical literacy as well as educational interaction between students and teachers, especially during online learning.

Students' ability in solving argumentation in mathematical induction and binomial theory is still lacking based on the results of the exam, so that evidence-based teaching materials are prepared. This study uses design research methods with the subject from 2nd semester students of the Mathematics Education Study Program. This research is a development research consisting of 6 stages: Identification of needs, Planning, Initial product development, Initial product testing, Product revision, Field trials so as to produce teaching materials. The results of the lecturer and student validation show that the teaching materials are valid and feasible to use with an average score of 45 and 45,9333. While the test of the effectiveness of teaching materials used using the t-test obtained results that ttest> ttable, 5.83 > 2.11 which means there is an increase in the average value of students before and after using teaching materials. With the increase in value, it indicates that the instructional materials prepared are effectively used.

This research is a descriptive qualitative approach which aims to describe profile of understanding of pythagoras theorem concept of students based on the difference of field independent and dependent cognitive style. The subjects of this study are 9th grade students of junior secondary school. Subject determination is done using GEFT instrument and mathematics teacher’s consultation, then continued by giving concept comprehension test on Pythagorean theorem material and interview. Checking the validity of data is done by time’s triangulation. The results showed that student: 1) states the meaning of Pythagoras's theorem given in his own language by noting Pythagorean theorem’s definition; 2) when using the concepts of Pythagoras theorem, students use triangle images as representations to facilitate an interpretation of given sides position. Then the students find the unknown values and use Pythagoras theorem to solve the problem; 3) using the necessary condition or sufficient condition of a concept to determine the area of a triangle using Pythagorean theorem by finding a side. While, the results for field independent cognitive style are student: 1) expresses the meaning of Pythagoras theorem by using their own language and mentioning the symbols; 2) using the concepts of Pythagorean theorem to solve the problem given by using multiplication operations to determine one of unknown sides. Then, student use pythagoras theorem to find the answer of the given problem; 3) using the necessary conditions or sufficient terms a concept of Pythagoras theorem by stating that it must be known two sides or not.

Penelitian ini merupakan penelitian deskriptif dengan pendekatan kualitatif yang bertujuan untuk mendeskripsikan profil pemahaman konsep limit mahasiswa berdasarkan gaya kognitif field dependent. Subjek penelitian ini adalah mahasiswa semester II UHAMKA Jakarta. Penelitian dimulai dengan menentukan subjek penelitian menggunakan instrumen GEFT serta kesediaan mahasiswa dan hasil konsultasi dengan dosen bidang studi, Kemudian dilanjutkan dengan pemberian tes pemahaman konsep limit fungsi (TPKLF) dan wawancara. Pengecekan keabsahan data menggunakan triangulasi waktu. Hasil penelitian menunjukan bahwa Pemahaman mahasiswa dengan gaya kognitif field dependent terhadap konsep limit ketika menyatakan makna limit yang diberikan menggunakan bahasanya sendiri hanya terpaku pada notasi limit yang diberikan. Subjek tidak dapat dapat mengkaitkan antar apa yang diketahui dalam soal dengan informasi lain yang diberikan. Ketika menggunakan konsep limit untuk menyelesaikan masalah yang diberikan, subjek tidak memenuhi indikator ini dikarenakan subjek menggunakan cara prosedural bukan menggunakan konsep limit yang diketahuinya untuk menyelesaikan masalah yang diberikan. Ketika menggunakan syarat perlu atau syarat cukup untuk menentukan ada atau tidaknya stuatu limit subjek mampu menggunakan syarat perlu untuk menentukan suatu limit jika limit tersebut tidak memiliki syarat yang berbeda. Jika limit yang diberikan memiliki syarat yang berbeda, subjek tersebut tidak dapat menggunakan syarat perlu untuk menentukan ada atau tidaknya suatu limit.

Tujuan penalitian ini adalah menghasilkan bahan ajar matematika melalui pendekatan kearifan lokal pada materi trigonometri yang layak dan sesuai kebutuhan siswa. Jenis penelitian ini adalah Penelitian dan Pengembangan (R&D) dengan menggunakan model ADDIE yang terdiri dari lima tahap, yaitu analyze (analisis), design (perancangan), development (pengembangan), implement (implementasi) dan evaluate (evaluasi). Instrumen yang digunakan yaitu lembar angket validasi ahli materi dan ahli media, angket respon guru matematika, dan angket respon siswa. Berdasarkan penelitian diperoleh hasil validasi ahli dengan persentase 80% (layak), respon guru dengan persentase 79% (baik) dan respon siswa dengan persentase 78% (baik). Secara keseluruhan bahan ajar ini dapat di terima dengan baik oleh guru dan siswa didukung oleh hasil validasi dari para ahli yang menyatakan bahan ajar layak digunakan untuk kegiatan belajar. Kata kunci: bahan ajar, trigonometri, kearifan lokal ABSTRACT The purpose of this research is to produce mathematics teaching materials through a local wisdom approach to trigonometry material that is appropriate and in accordance with the needs of students. This type of research is Research and Development (R&D) using the ADDIE model which consists of five stages, that is analyze, design, development, implement and evaluate. The instrument used were questionnaire validation sheet material experts and media expert, mathematics teacher response questionnaire and student response questionnaire. Based on the research results obtained by expert validation with a percentage of 80% (feasible), teacher response with a percentage of 79% (good) and responses students with a percentage of 78% (good0. Overall this teaching material can be well received by teachers and studens, supported by validation results from experts who claim teaching materials are suitable for use in learning activities. Keywords: teaching materials, trigonometry, local wisdom